Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Earnings Including Redeemable Noncontrolling Interest	$ 44.3	$ 39.1	$ 119.4	$ 82.3
Hedging adjustments:
Reclassifications to net earnings	0.0	0.0	0.0	7.1
Foreign currency translation adjustments:
Unrealized foreign currency translation adjustments	0.0	(1.1)	1.8	(1.9)
Tax expense on other comprehensive income:
Reclassifications to net earnings	0.0	0.0	0.0	(0.4)
Total Other Comprehensive (Loss) Income Including Redeemable Noncontrolling Interest	0.0	(1.1)	1.8	4.8
Less: Comprehensive income attributable to redeemable noncontrolling interest	0.0	0.0	0.0	38.3
Total Comprehensive Income Available to Common Stockholders	$ 44.3	$ 38.0	$ 121.2	$ 48.8